Pro Russian protests in Ukraine

The video discusses the political unrest in Crimea, where protesters have raised the Russian flag on government buildings, challenging the new pro-European government in Kiev. Many in Crimea wish to rejoin Russia, causing concern in Kiev. The interim Ukrainian government has condemned these actions, labeling the armed groups as terrorists. Crimea's strategic importance is highlighted by its Russian-speaking population and the presence of a major Russian naval base. The Kremlin has put its military on standby, indicating potential intervention, which complicates efforts to maintain Ukraine's unity.

What concerns does the desire to break away from Ukraine raise in Kiev?

What is the significance of the Russian military presence in Crimea according to the text?